/*
* Copyright (c) Microsoft Corporation. All rights reserved.
* Copyright (c) 2023 Huawei Device Co., Ltd.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* This file has been modified by Huawei to verify type inference by adding verification statements.
*/

// === tests/cases/compiler/unionReductionMutualSubtypes.ts ===
declare function AssertType(value:any, type:string):void;
// Repro from #35414

interface ReturnVal {
    something(): void;
}

const k: ReturnVal = { something() { } 
AssertType(k, "ReturnVal");

AssertType({ something() { } }, "{ something(): void; }");

AssertType(something, "() => void");
}

declare const val: ReturnVal;
AssertType(val, "ReturnVal");

function run(options: { something?(b?: string): void }) {
    const something = options.something ?? val.something;
AssertType(something, "(?union) => void");
AssertType(options.something ?? val.something, "(?union) => void");
AssertType(options.something, "union");
AssertType(val.something, "() => void");

    something('');
AssertType(something(''), "void");
AssertType(something, "(?union) => void");
AssertType('', "string");
}


